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/*
* Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/* @test
* @summary Verify that ClassCastException is thrown when deserializing
* an object and one of its object fields is incompatibly replaced
* by either replaceObject/resolveObject.
*
*/
import java.io.*;
class A implements Serializable {
private static final long serialVersionUID = 1L;
}
class B implements Serializable {
private static final long serialVersionUID = 1L;
}
class Container implements Serializable {
private static final long serialVersionUID = 1L;
A a = new A();
}
class ReplacerObjectOutputStream extends ObjectOutputStream {
static B b = new B();
public ReplacerObjectOutputStream(OutputStream out) throws IOException {
super(out);
enableReplaceObject(true);
}
protected Object replaceObject(Object obj) throws IOException {
if(obj instanceof A) {
System.err.println("replaceObject(" + obj.toString() + ") with " +
b.toString());
return b;
} else return obj;
}
}
public class BadSubstByReplace {
public static void main(String args[]) throws IOException, ClassNotFoundException {
Container c = new Container();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ReplacerObjectOutputStream out = new ReplacerObjectOutputStream(baos);
out.writeObject(c);
out.close();
ObjectInputStream in =
new ObjectInputStream(new ByteArrayInputStream(baos.toByteArray()));
try {
c = (Container)in.readObject(); // throws IllegalArgumentException.
throw new Error("Should have thrown ClassCastException");
} catch ( ClassCastException e) {
System.err.println("Caught expected exception " + e.toString());
e.printStackTrace();
} finally {
in.close();
}
}
}
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